Electric heater



April 1o, 192s.

M. K. PURDY ET Ax. l

ELECTRI C HEATER Filed Aug. 3l. 1927 lll/l l l l l l l I l l l l I Il Patented Apr. 10, 1928.

UNITED STATES 1,665,861 PATENT oFFicE.

MARTIN K. PURDY, OF STROUDSBU'RG, AND WILLIAM H. REAGL, OF TOBYHANNA, PENNSYLVANIA.

ELECTRIC HEATER.

Application led August 31, 1927.

Thisinvention relates to electric heaters and has for an object to provide a heater which may be made in a great variety of sizes for a great varietylof purposes from heating a` building to heating a smaller body of water, the heating medium employed being water.

A further object of the invention is to provide an electric heater having chambers for containing the electric heating elements with adjacent'chambers through which the water circulates in the usual manner of circulating systems.

A further object of the invention is to provide improved means for securing ready access to the interior of the device for replacing heating elements or other repairs or replacements as occasion may require.

' With these and other objects in view, the invention comprises certain novel features, elements, units, constructions, interactions and functions as disclosed in the drawings together with mechanical and functional equivalents thereof as will be hereinafter more fully described and claimed.

ln the drawings:

Figure 1 is a view in side elevation of the heating unit with parts broken away to show the interior construction.

Figure 2 is a transverse vertical sectional view taken on line 2-2 of Figure 1.

Figure 3 is a diagrammatic view showing a means `for controlling the heat generated by the unit.

Like characters of reference indicate corresponding parts throughout the several views.

The improved heating element which forms the subject matter of this application comprises a housing 10 of such size, shape and dimensions as adaptedk to perform the functions and produce the heat required. The housing l() is provided with interior chambers 11 and 12 which will bei referred to as the heating chambers with narrow or thin chambers 13, 14 and 15 adjacent the heating chambers and to be referred to as the circulating chambers.

Upon the exterior of the housing 10 a plurality of lugs 16 are provided so spaced and positioned that the heating elements 17 may be inserted through the heating chambers and attached to said lugs 16 in any approved manner as by the screws or bolts 18.

The heating units 17 are of a well known Serial No. 216,638.

commercial type andrwill not be further described except that they aire provided with binding. screws 19 to which are' secured thev incoming feed wires 20.

Upon the exterior of the housing and covering over the lugs 16 and the extended and secured ends of the heating elements 17 are cover members 21 which are secured in any approved manner as by forming lugs 22 thereon and bolt-ing such lugs 23 formed upon the exterior of the housing 10. The cover members 21 are provided with relatively closed and insulated sleeves 24 to accommodate the passage of the several feed wires. The cover members 2l are also provided with means for observing the interior, consisting of a transparent sheet 25 of mica or other like l1eatresisting material.

Upon the top and bottom of the housing 10, headers 26 and 27 are secured in any approved manner as by the use of the well known connecting means of flanges 28 and 29 with bolts 30. The headers 26 and 27 are provided with nipples 31 for the outflow, and 32 for the inflow, such headers communicating with the circulating chambers 13, 14 and 15 so that the cold water inflowing at the nipple 32 into the header 27 is heated in the circulating chambers passing upwardly into the header 26 and outwardly flowing through the nipples 31.

At Figure 3 has been shown diagrammatically a switch box 33 for rmanually c0n-.

trolling the supply of electrical energy independently of each of the several heating elements.` It is to be understood, however, that this is only shown as indicative of some type of control whereby the rapidity of heating may be varied and is intendedto include not only a manual. control but any automatic control responsive to the temperatures of the heated areas.

It is believed that the foregoing descrip tion of the construction with the explanatory matter relative to operation accompanying the description will afford a complete understanding of the operation of the device and that further description of the operation would be superfluous.

lVhat we claim to be new is:

1. An electric heater comprising a housing having heating chambers normally open to the atmosphere upon opposite sides, lugs formed upon the exterior of the housing ad* jacent the open sides, electrical heating elemembers for the extended ends oE the heating elements7 means to accommodate conductors extended through the cover member into the heating chambers and connecting with the heating elements, transparent observation ports provided in the cover members, circulating chambers contiguous to and recevinglheat from the heatingI Chambers, and means to connect inflow and outflow instru mentalities with the circulating chambers.

In testimony whereof We aiiix our sig- 25 natures.

MARTIN K. PURDY. WILLIAM H. REAGLE. 

